JPH10111620A - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPH10111620A JPH10111620A JP28317796A JP28317796A JPH10111620A JP H10111620 A JPH10111620 A JP H10111620A JP 28317796 A JP28317796 A JP 28317796A JP 28317796 A JP28317796 A JP 28317796A JP H10111620 A JPH10111620 A JP H10111620A
- Authority
- JP
- Japan
- Prior art keywords
- guide member
- fixing roller
- separation claw
- fixing
- upper guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は複写機、プリンタ、
ファクシミリ等の画像形成装置において用いられる定着
装置に関し、特に、用紙が定着ローラに巻き付くのを防
止するための分離爪を備える定着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, a printer,
The present invention relates to a fixing device used in an image forming apparatus such as a facsimile, and more particularly, to a fixing device having a separation claw for preventing paper from being wound around a fixing roller.
【０００２】[0002]
【従来の技術】この種の定着装置については、用紙の定
着ローラへの巻き付きを防止するために種々の装置が提
案されている。例えば特公平8−２９８７３号公報に示
される装置は、定着ローラに当接して設けられた移動可
能な巻き付き防止材とそれを案内する案内部とを有し、
案内部はくの字形をしており、記録材のジャム時、巻き
付き防止部材が記録材の押圧力により案内部にそってそ
の全体が定着ローラから離間するようになっている。ま
た特開昭６０−１３４２６５号公報に示されるようなも
のもある。この装置は、巻き付き防止片の支軸を移動可
能に設け、巻き付き防止片がガイド部材（ペーパガイド
部材）の後方まで移動できるようにしたものである。2. Description of the Related Art Various types of fixing devices of this type have been proposed in order to prevent paper from being wound around a fixing roller. For example, the device disclosed in Japanese Patent Publication No. Hei 8-29873 has a movable anti-winding member provided in contact with the fixing roller and a guide portion for guiding the anti-winding member,
The guide portion has a U-shape, and when the recording material is jammed, the winding prevention member is entirely separated from the fixing roller along the guide portion by the pressing force of the recording material. There is also one disclosed in JP-A-60-134265. In this device, the support shaft of the anti-winding piece is movably provided so that the anti-winding piece can move to the rear of the guide member (paper guide member).
【０００３】[0003]
【発明が解決しようとする課題】特公平８−２９８７３
号公報に開示されている装置は、図７に示すように定着
ローラ１に当接して設けた巻き付き防止部材である分離
爪４をくの字形をしたガイド部材に沿って移動可能と
し、用紙がジャムしたとき、その押圧力により分離爪４
を移動させ、分離爪４全体を定着ローラ１から離すもの
であるため、図８のように用紙Ｐが蛇腹状にジャムした
ときは有効である。なお図８中の２はヒータ、３は下定
着ローラ（加圧ローラともいう。）、５は上ガイド部
材、６は下ガイド部材である。定着ローラ１に接する用
紙巻付き防止用の分離爪４は揺動可能に軸支され、一端
を定着ローラ１に当接するように付勢してあり、かつ上
方へ移動可能としてある。[Problems to be solved by the invention] Japanese Patent Publication No. Hei 8-29873
As shown in FIG. 7, the apparatus disclosed in Japanese Patent Application Laid-Open Publication No. H11-209334 allows a separation claw 4 which is a winding prevention member provided in contact with the fixing roller 1 to move along a V-shaped guide member so that paper can be moved. When a jam occurs, the separation claw 4
Is moved so that the entire separation claw 4 is separated from the fixing roller 1, so that it is effective when the sheet P is jammed in a bellows shape as shown in FIG. In FIG. 8, 2 is a heater, 3 is a lower fixing roller (also referred to as a pressure roller), 5 is an upper guide member, and 6 is a lower guide member. The separation claw 4 for preventing paper wrapping which comes into contact with the fixing roller 1 is pivotally supported so as to be swingable, and one end thereof is urged so as to come into contact with the fixing roller 1 and can be moved upward.
【０００４】ところが、用紙Ｐの先端に画像があると、
トナーと定着ローラ１との密着性のため用紙先端部が強
くなり、分離爪４では剥がしにくくなる。この点を考慮
して一般的には、ペーパー先端に画像が形成されないよ
うにして分離しやすくしている。しかし用紙Ｐのレジス
トずれで先端に画像が形成されたり、地肌汚れで先端が
黒く汚れる場合があり、このようなとき定着ローラ１に
用紙Ｐが巻き付きやすくなり、図８のように分離爪４を
押し上げることになる。図８の状態からさらに分離爪４
が押し上げられると、分離爪４は定着ローラ１から離れ
てしまうことになり、このため用紙Ｐは完全に定着ロー
ラ１に巻き付いてしまうことになる。すると、ジャム除
去性が極めて悪くなるので、このような状態になること
は絶対に避けなければならない。However, if there is an image on the leading edge of the paper P,
Due to the adhesion between the toner and the fixing roller 1, the leading end of the sheet becomes strong, and it is difficult for the separation claw 4 to peel off. In consideration of this point, generally, an image is not formed at the leading end of the paper to facilitate separation. However, there is a case where an image is formed at the leading end due to the registration deviation of the paper P, or the leading end becomes black due to background contamination. In such a case, the paper P easily winds around the fixing roller 1, and the separation claw 4 is moved as shown in FIG. Will push it up. Separating claw 4 from the state of FIG.
Is pushed up, the separation claw 4 separates from the fixing roller 1, so that the sheet P is completely wound around the fixing roller 1. Then, the jam removal becomes extremely poor, and such a situation must be avoided.
【０００５】特開昭６０−１３４２６５号公報に開示さ
れている装置は、巻き付き防止片の支点軸を移動可能に
設け、分離爪４が上ガイド部材５より後方へ移動できる
ようにしたものである。ところが、この装置も、蛇腹状
に用紙Ｐがジャムしたときは有効であるが、用紙Ｐ先端
に画像がある場合は、分離爪４を押し上げ、上ガイド部
材５の後方まで用紙Ｐ先端がきて、分離爪４により分離
することはできても、図９に示すように上ガイド部材５
先端に用紙Ｐが引っ掛かり、ジャムしてしまうことにな
る。In the apparatus disclosed in Japanese Patent Application Laid-Open No. 60-134265, a fulcrum shaft of a winding prevention piece is provided so as to be movable, so that the separation claw 4 can be moved rearward from the upper guide member 5. . However, this apparatus is also effective when the paper P is jammed in a bellows shape. However, when an image is present at the leading end of the paper P, the separation claw 4 is pushed up, and the leading end of the paper P comes to the rear of the upper guide member 5, Although it can be separated by the separation claw 4, as shown in FIG.
The paper P will be caught on the leading end and jammed.
【０００６】本発明は上記従来の問題点に鑑み、用紙先
端に画像があるような場合でも確実に用紙を分離できる
ようにした手段を備える定着装置を提供することを目的
とする。SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a fixing device having means for reliably separating a sheet even when an image is present at the leading end of the sheet.
【０００７】[0007]
【課題を解決するための手段】本発明の定着装置のうち
請求項１に係るものは、上記目的を達成するために、用
紙に転写されたトナーを定着ローラを用いて上記用紙に
定着する装置であって、上記定着ローラに接するシート
巻き付き防止用の分離爪を揺動可能に軸支するととも
に、該分離爪の一端を上記定着ローラに当接する方向に
付勢する付勢部材と、上記定着ローラから分離した用紙
を案内するガイド部材を有する定着装置において、上記
ガイド部材を、上記定着ローラから離れた側にある部位
を中心に揺動可能に軸支し、該ガイド部材の上記定着ロ
ーラ側の部位で上記分離爪を軸支して、上記分離爪の移
動により上記ガイド部材も移動可能としてなることを特
徴とする。According to a first aspect of the present invention, there is provided an apparatus for fixing toner transferred to a sheet to a sheet by using a fixing roller to achieve the above object. An urging member for pivotally supporting a separation claw for preventing sheet winding in contact with the fixing roller, and urging one end of the separation claw in a direction in which the separation claw comes into contact with the fixing roller; In a fixing device having a guide member for guiding a sheet separated from a roller, the guide member is pivotally supported so as to be able to swing around a portion on a side distant from the fixing roller, and the guide member is located on the fixing roller side. The separation claw is pivotally supported at the portion, and the guide member can also be moved by the movement of the separation claw.
【０００８】同請求項２に係るものは、上記分離爪また
は上記ガイド部材のいずれか一方の動きを検出する手段
を設け、該手段による上記分離爪または上記ガイド部材
の移動開始の検出信号により上記定着ローラの回転を停
止するようにしたことを特徴とする。According to a second aspect of the present invention, there is provided means for detecting the movement of one of the separation claw and the guide member, and the detection means detects the movement of the separation claw or the guide member by the detection signal. The rotation of the fixing roller is stopped.
【０００９】同請求項３に係るものは、上記ガイド部材
を一対のガイド板で構成し、一のガイド板に上記分離爪
を軸支し、他のガイド板も揺動可能に軸支したことを特
徴とする。According to a third aspect of the present invention, the guide member is constituted by a pair of guide plates, one of the guide plates is pivotally supported, and the other guide plate is pivotally supported. It is characterized by.
【００１０】同請求項４に係るものは、上記分離爪と該
分離爪を軸支したガイド部材とを一つの加圧手段により
定位置へ付勢することを特徴とする。According to a fourth aspect of the present invention, the separation claw and a guide member which supports the separation claw are urged to a fixed position by a single pressing means.
【００１１】[0011]
【発明の実施の形態】以下本発明の実施の形態を図面を
参照して説明する。なお以下では従来と共通する部分に
ついては共通する符号を付し、重複する説明は省略す
る。Embodiments of the present invention will be described below with reference to the drawings. In the following, portions common to the related art are denoted by the same reference numerals, and redundant description will be omitted.
【００１２】図１は本発明に係る定着装置の一実施形態
の側面図である。図示の装置は、分離爪４を支持軸７を
中心に揺動可能に軸支してあり、加圧スプリング８によ
り揺動付勢されて定着ローラ１に圧接している。加圧ス
プリング８の一端は支持部材９により支持してあり、他
端は分離爪４の後方側に設けた凸部４ａにはめてある。
また１０は分離爪４の支持軸７の保持部材であり、用紙
Ｐの移動をガイドするための上ガイド部材１１に一体化
して取り付けてある。FIG. 1 is a side view of one embodiment of a fixing device according to the present invention. In the illustrated device, the separation claw 4 is pivotally supported on a support shaft 7 so as to be swingable, and is urged to swing by a pressure spring 8 to press against the fixing roller 1. One end of the pressure spring 8 is supported by a support member 9, and the other end is fitted to a projection 4 a provided on the rear side of the separation claw 4.
Reference numeral 10 denotes a holding member for supporting the support shaft 7 of the separation claw 4 and is integrally attached to an upper guide member 11 for guiding the movement of the sheet P.
【００１３】図２は、分離爪４とその保持部材１０を詳
細に示す斜視図である。分離爪４の支持軸７は保持部材
１０の上縁部に設けた凹部１０ａにはまっており、分離
爪４の先端４ｂは保持部材１０の下面に設けた切り欠き
１０ｂの内側に位置している。また保持部材１０は、定
着ローラ１側の先端を上ガイド部材１１の先端に一致す
るように一体化して取り付けてある。FIG. 2 is a perspective view showing the separating claw 4 and its holding member 10 in detail. The support shaft 7 of the separation claw 4 is fitted into a concave portion 10a provided on the upper edge of the holding member 10, and the tip 4b of the separation claw 4 is located inside a notch 10b provided on the lower surface of the holding member 10. . The holding member 10 is integrally mounted so that the tip of the fixing roller 1 side coincides with the tip of the upper guide member 11.
【００１４】また上ガイド部材１１は、上排紙ローラ１
２ａの軸受１３の外側に嵌合し、軸受１３を中心として
揺動可能となっている。また上ガイド部材１１は、分離
爪４の加圧スプリング８の加圧力により保持部材１０と
ともに揺動付勢され、通常の状態では先端がストッパ１
７に当接している。１４は下用紙ガイド部材であり、下
排紙ローラ１２ｂの軸受１５の外側に一部を嵌合させ、
軸受１５を中心として揺動可能となっており、下方側か
ら加圧スプリング１６により揺動付勢され、通常の状態
では先端がストッパ１７に当接している。なお図中１８
は加圧スプリング８の支持部材、１９は加圧スプリング
１６の支持部材である。The upper guide member 11 is provided on the upper discharge roller 1.
2a is fitted to the outside of the bearing 13 and is swingable about the bearing 13. The upper guide member 11 is oscillated and urged together with the holding member 10 by the pressing force of the pressing spring 8 of the separation claw 4, and the tip of the upper guide member 11 is the stopper 1 in a normal state.
7 is in contact. A lower paper guide member 14 partially fits outside the bearing 15 of the lower paper discharge roller 12b,
It is swingable about a bearing 15 and is urged to swing from below by a pressure spring 16, and its tip abuts a stopper 17 in a normal state. In the figure, 18
Is a supporting member for the pressing spring 8 and 19 is a supporting member for the pressing spring 16.
【００１５】また図３に示すように、分離爪４や上ガイ
ド部材１１の上方には、これらの動きを検出するセンサ
２０が設けてある。このセンサ２０は、検知レバー２１
を支点２２を中心として揺動可能に支持し、検知レバー
２１の一端２１ａのセンサ本体２３への出没を検出する
ようになっている。即ち、検知レバー２１の先端端２１
ｂが分離爪４の保持部材１０の上縁と当接しており、分
離爪４や上ガイド部材１１が上方へ動くと検知レバー２
１が一緒に押し上げられ、検知レバー２１の一端２１ａ
がセンサ本体２３から外れるようになっている。センサ
本体２３としてはフォトセンサが適するが、その他の種
類のセンサであってもよい。As shown in FIG. 3, above the separation claw 4 and the upper guide member 11, there is provided a sensor 20 for detecting the movement thereof. The sensor 20 includes a detection lever 21
Is supported so as to be swingable about a fulcrum 22 to detect whether one end 21a of the detection lever 21 is protruded or retracted from the sensor main body 23. That is, the tip end 21 of the detection lever 21
b is in contact with the upper edge of the holding member 10 of the separation claw 4, and when the separation claw 4 and the upper guide member 11 move upward, the detection lever 2
1 are pushed up together, and one end 21a of the detection lever 21 is
Are detached from the sensor main body 23. Although a photo sensor is suitable as the sensor body 23, other types of sensors may be used.
【００１６】このため、分離爪４がある位置まで動くと
検知レバー２１の動きによりそれをセンサ本体２３が検
出し、定着ローラ１を停止させ、分離爪４が少しくらい
動いただけでは検知レバー２１がセンサ本体２３から外
れないので検出しない。具体的には、図２で示す位置Ｏ
１は通常の分離爪４の位置、位置Ｏ２ではセンサ２０は
作動せず、位置Ｏ２を越えて位置Ｏ３となるとセンサ本
体２３から検知レバー２１の一端２２ａが離れる。なお
検出する位置が位置Ｏ１からあまり離れていないと、定
着ローラ１との密着力が少ない用紙でもジャムとして作
動してしまうので、適宜調整する必要がある。For this reason, when the separation claw 4 moves to a certain position, the sensor body 23 detects the movement of the detection lever 21 and stops the fixing roller 1. Since it does not come off the sensor body 23, it is not detected. Specifically, position O shown in FIG.
Reference numeral 1 denotes a normal position of the separation claw 4 and the sensor 20 does not operate at the position O2. If the position to be detected is not too far from the position O1, even a sheet having a small adhesive force with the fixing roller 1 operates as a jam, so that it is necessary to appropriately adjust the sheet.
【００１７】以上のような本発明の実施形態における動
作を説明する。通常の用紙Ｐの分離、搬送状態は図４の
ようになり、分離爪４は押し上げられないで定位置にあ
る。ところが用紙Ｐ先端に画像が形成されている場合
は、定着ローラ１と用紙Ｐの密着度が増し、分離爪４を
加圧スプリング８による付勢力に抗して押し上げる。用
紙Ｐが分離爪４を押し上げていくと、分離爪４の定着ロ
ーラ１への押し付け力が増し、そこで用紙Ｐは定着ロー
ラ１から分離し、図５に示すように上下のガイド部材１
１、１４間へ搬送され、排出される。このとき分離爪４
と上ガイド部材１１とが一体となって動くので、上ガイ
ド部材１１よりも分離爪４が用紙搬送方向後方まで移動
しそこで用紙Ｐがガイド部材に引っ掛かることもない。The operation of the above embodiment of the present invention will be described. The normal separation and transport state of the sheet P is as shown in FIG. 4, and the separation claw 4 is not pushed up and is at a fixed position. However, when an image is formed on the leading edge of the sheet P, the degree of adhesion between the fixing roller 1 and the sheet P increases, and the separation claw 4 is pushed up against the urging force of the pressure spring 8. When the paper P pushes up the separation claw 4, the pressing force of the separation claw 4 against the fixing roller 1 increases, whereupon the paper P separates from the fixing roller 1, and as shown in FIG.
It is transported between 1 and 14 and discharged. At this time, the separation claw 4
And the upper guide member 11 move integrally, so that the separation claw 4 moves to the rear in the sheet conveyance direction more than the upper guide member 11, and the sheet P does not get caught on the guide member.
【００１８】なお分離爪４の定着ローラ１への接触圧を
最初から強くしておくと、定着ローラ１との摩擦力が増
し、定着ローラ１が摩耗しやすいが、本実施形態のよう
にしておけば、分離爪４の接触圧を弱く設定し、用紙Ｐ
の定着ローラ１への密着の強い場合のみ分離爪４の定着
ローラ１への接触圧がだんだん強くなり、分離性が上が
るように構成できるので、定着ローラ１の寿命を延ばす
ことにもなる。If the contact pressure of the separation claw 4 to the fixing roller 1 is increased from the beginning, the frictional force with the fixing roller 1 increases, and the fixing roller 1 is easily worn. By setting the contact pressure of the separation claw 4 to be weak, the paper P
Only when the contact of the fixing claw 4 with the fixing roller 1 is strong, the contact pressure of the separation claw 4 with the fixing roller 1 gradually increases, so that the separation property can be increased, so that the life of the fixing roller 1 can be extended.
【００１９】また上述のように、分離爪４か上ガイド部
材１１のいずれかの動きを検出することにより定着ロー
ラ１の回転を停止させるが、分離爪４の動きが大きいと
きは定着ローラ１と用紙Ｐの密着力が大きい場合か、図
６に示すように蛇腹状にジャムした場合である。このよ
うなときは、ただちに機械を停止するようにすれば、定
着ローラ１に用紙Ｐが巻き付いたり、蛇腹状にジャムし
て分離爪４による定着ローラ１の損傷が防がれる。As described above, the rotation of the fixing roller 1 is stopped by detecting the movement of either the separation claw 4 or the upper guide member 11. However, when the movement of the separation claw 4 is large, the fixing roller 1 is stopped. This is a case where the adhesion of the sheet P is large or a case where the paper P is jammed in a bellows shape as shown in FIG. In such a case, if the machine is stopped immediately, the paper P is wound around the fixing roller 1 or jammed in a bellows shape, thereby preventing the fixing roller 1 from being damaged by the separation claw 4.
【００２０】[0020]
【発明の効果】請求項１に係る定着装置は、以上説明し
てきたように分離爪の移動によりガイド部材も移動する
ようにしたので、分離爪が用紙に押されて分離してもガ
イド部材に引っ掛かることもなく、スムーズに排紙さ
れ、また用紙が蛇腹状にジャムしてもガイド部材と分離
爪が一体となって移動するので、分離爪により定着ロー
ラに損傷を与えてしまうことを緩和できるという効果が
ある。According to the first aspect of the present invention, as described above, the guide member is also moved by the movement of the separation claw. The paper is smoothly ejected without being caught, and even if the paper jams in a bellows shape, the guide member and the separation claw move together, so that the fixing claw can be prevented from being damaged by the separation claw. This has the effect.
【００２１】請求項２に係る定着装置は、以上説明して
きたように分離爪の移動またはガイド部材の移動を検出
し、それにより定着ローラの回転を停止するようにした
ので、上記共通の効果に加え、用紙が定着ローラに巻き
付く直前または蛇腹状のジャム状態になる直前に定着ロ
ーラを停止させることでき、巻き付きジャム、蛇腹状ジ
ャムを防止でき、分離爪が定着ローラにダメージを与え
ることや、ジャム処理の困難さを回避できるという効果
がある。The fixing device according to the second aspect detects the movement of the separation claw or the movement of the guide member as described above, and thereby stops the rotation of the fixing roller. In addition, the fixing roller can be stopped immediately before the paper is wound around the fixing roller or immediately before the paper enters a bellows-like jam state, so that the winding jam and the bellows-like jam can be prevented, and the separation claw may damage the fixing roller, There is an effect that the difficulty of the jam processing can be avoided.
【００２２】請求項３に係る定着装置は、以上説明して
きたように一対のガイド部材のうち分離爪を軸支するも
のも軸支しないものもともに揺動可能としたので、上記
共通の効果に加え、さらに蛇腹状ジャムが発生した際の
分離爪が定着ローラにダメージを与えることを少なくす
ることができるという効果がある。In the fixing device according to the third aspect, as described above, both of the pair of guide members which support the separation claw and those which do not support the separation claw are swingable. In addition, there is an effect that it is possible to reduce the possibility that the separation claw damages the fixing roller when a bellows-like jam occurs.
【００２３】請求項４に係る定着装置は、以上説明して
きたように分離爪の定着ローラへの加圧手段とガイド部
材の加圧手段を同一にしたことにより、安価できわめて
単純な構成にすることができるという効果がある。The fixing device according to the fourth aspect has an inexpensive and extremely simple configuration by using the same pressing means for pressing the fixing roller of the separation claw and pressing means of the guide member as described above. There is an effect that can be.
【図１】本発明に係る定着装置の一実施形態の側面図で
ある。FIG. 1 is a side view of an embodiment of a fixing device according to the present invention.
【図２】図１の装置の分離爪とその保持部材を詳細に示
す斜視図である。FIG. 2 is a perspective view showing a separating claw and a holding member of the apparatus of FIG. 1 in detail.
【図３】図１の装置の動作状態の側面図である。FIG. 3 is a side view of the operation state of the apparatus of FIG. 1;
【図４】図１の装置での通常の用紙の分離、搬送状態の
側面図である。FIG. 4 is a side view of a normal sheet separation and conveyance state in the apparatus of FIG. 1;
【図５】図１の装置での通常の用紙の分離、搬送、排出
状態の側面図である。FIG. 5 is a side view of a normal sheet separation, conveyance, and discharge state in the apparatus of FIG. 1;
【図６】図１の装置での蛇腹状のジャム状態の側面図で
ある。FIG. 6 is a side view of the apparatus of FIG. 1 in a bellows-like jam state.
【図７】従来の定着装置における用紙分離状態の側面図
である。FIG. 7 is a side view of a conventional fixing device in a sheet separation state.
【図８】従来の装置での定着ローラへの用紙の蛇腹状の
巻き付き状態の側面図である。FIG. 8 is a side view showing a state in which a sheet is wrapped in a bellows shape around a fixing roller in a conventional apparatus.
【図９】従来の装置において用紙のガイド部材に用紙が
引っかかった状態の側面図である。FIG. 9 is a side view showing a state in which a sheet is caught on a sheet guide member in a conventional apparatus.
１ 定着ローラ ２ ヒータ ３ 下定着ローラ（加圧ローラ） ４ 分離爪 ７ 支持軸 ８、１６ 加圧スプリング ９ 支持部材 １０ 保持部材 １１ 上ガイド部材 １２ａ 上排紙ローラ １２ｂ 下排紙ローラ １３ 軸受 １４ 下用紙ガイド部材 １５ 軸受 １７ ストッパ １８、１９ 支持部材 ２０ センサ ２１ 検知レバー ２３ センサ本体 Ｐ 用紙 DESCRIPTION OF SYMBOLS 1 Fixing roller 2 Heater 3 Lower fixing roller (pressure roller) 4 Separating claw 7 Support shaft 8, 16 Pressure spring 9 Support member 10 Holding member 11 Upper guide member 12a Upper discharge roller 12b Lower discharge roller 13 Bearing 14 Lower Paper guide member 15 Bearing 17 Stopper 18, 19 Support member 20 Sensor 21 Detection lever 23 Sensor body P Paper
Claims (4)
用いて上記用紙に定着する装置であって、上記定着ロー
ラに接するシート巻き付き防止用の分離爪を揺動可能に
軸支するとともに、該分離爪の一端を上記定着ローラに
当接する方向に付勢する付勢部材と、上記定着ローラか
ら分離した用紙を案内するガイド部材を有する定着装置
において、上記ガイド部材を、上記定着ローラから離れ
た側にある部位を中心に揺動可能に軸支し、該ガイド部
材の上記定着ローラ側の部位で上記分離爪を軸支して、
上記分離爪の移動により上記ガイド部材も移動可能とし
てなることを特徴とする定着装置。1. An apparatus for fixing toner transferred to a sheet to a sheet by using a fixing roller, wherein a separation claw for preventing sheet wrapping, which is in contact with the fixing roller, is pivotally supported, and In a fixing device having an urging member for urging one end of the separation claw in a direction of contacting the fixing roller and a guide member for guiding a sheet separated from the fixing roller, the guide member is separated from the fixing roller. Side pivotally supported about the part on the side, the separation claw is supported at the part of the guide member on the fixing roller side,
The fixing device, wherein the guide member is also movable by the movement of the separation claw.
れか一方の動きを検出する手段を設け、該手段による上
記分離爪または上記ガイド部材の移動開始の検出信号に
より上記定着ローラの回転を停止するようにしたことを
特徴とする請求項１の定着装置。2. A means for detecting the movement of one of the separation claw and the guide member, and the rotation of the fixing roller is stopped by a detection signal of the movement start of the separation claw or the guide member by the means. The fixing device according to claim 1, wherein
し、一のガイド板に上記分離爪を軸支し、他のガイド板
も揺動可能に軸支したことを特徴とする請求項１または
２の定着装置。3. The guide member according to claim 1, wherein the guide member is constituted by a pair of guide plates, one of the guide plates is pivotally supported, and the other guide plate is pivotally supported. Or 2 fixing devices.
部材とを一つの加圧手段により定位置へ付勢することを
特徴とする請求項１ないし３のいずれかの定着装置。4. The fixing device according to claim 1, wherein the separation claw and the guide member that supports the separation claw are urged to a fixed position by a single pressing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28317796A JPH10111620A (en) | 1996-10-04 | 1996-10-04 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28317796A JPH10111620A (en) | 1996-10-04 | 1996-10-04 | Fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10111620A true JPH10111620A (en) | 1998-04-28 |
Family
ID=17662158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28317796A Pending JPH10111620A (en) | 1996-10-04 | 1996-10-04 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10111620A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001222182A (en) * | 2000-02-07 | 2001-08-17 | Kyocera Mita Corp | Paper peeling mechanism for image forming device |
| JP2002099174A (en) * | 2000-09-25 | 2002-04-05 | Canon Inc | Image heating device and image forming apparatus |
| WO2012026171A1 (en) * | 2010-08-25 | 2012-03-01 | シャープ株式会社 | Recording material conveyance apparatus, and image forming apparatus |
| JP2018163275A (en) * | 2017-03-27 | 2018-10-18 | コニカミノルタ株式会社 | Image formation device |
-
1996
- 1996-10-04 JP JP28317796A patent/JPH10111620A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001222182A (en) * | 2000-02-07 | 2001-08-17 | Kyocera Mita Corp | Paper peeling mechanism for image forming device |
| JP2002099174A (en) * | 2000-09-25 | 2002-04-05 | Canon Inc | Image heating device and image forming apparatus |
| JP4579393B2 (en) * | 2000-09-25 | 2010-11-10 | キヤノン株式会社 | Image heating device |
| WO2012026171A1 (en) * | 2010-08-25 | 2012-03-01 | シャープ株式会社 | Recording material conveyance apparatus, and image forming apparatus |
| JP2012046270A (en) * | 2010-08-25 | 2012-03-08 | Sharp Corp | Recording material conveyance apparatus and image forming apparatus |
| US8971731B2 (en) | 2010-08-25 | 2015-03-03 | Sharp Kabushiki Kaisha | Recording material conveying device and image forming apparatus |
| US9465333B2 (en) | 2010-08-25 | 2016-10-11 | Sharp Kabushiki Kaisha | Recording material conveying device and image forming apparatus |
| JP2018163275A (en) * | 2017-03-27 | 2018-10-18 | コニカミノルタ株式会社 | Image formation device |
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